Elastomeric Particle Discharge Flap for Heavy-Duty Filter Systems
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Solution Overview
Problem
Existing particle discharge devices in heavy-duty applications, such as trucks and construction machinery, require improved designs to efficiently manage particle discharge with reduced installation space and enhanced durability, while maintaining high pre-separation efficiency.
Innovation Solution
A one-piece plastic injection molded particle discharge device with an elastomer material, featuring a tubular, rotationally symmetrical housing and a particle discharge flap that is elastically deformable, allowing for automatic operation between open and closed states based on weight and negative pressure, with a partially rotating valve seat to minimize installation space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional multi-part particle discharge device is used, then assembly flexibility is improved, but device complexity and potential leak points increase
Solution Approach 1:
The patent merges the housing and particle discharge flap into a single one-piece elastomeric component manufactured via injection molding. This eliminates the need for separate parts and assembly operations, reducing device complexity while maintaining manufacturing efficiency through high-volume molding processes.
2Reliability
If a complete 360-degree valve seat is used, then sealing reliability is improved, but installation space requirements increase
Solution Approach 1:
The patent implements a partial valve seat that extends only approximately 120 degrees around the discharge opening instead of a complete 360-degree seat. This partial action provides sufficient sealing reliability for the application while significantly reducing the installation space and material requirements.
3Strength
If a rigid particle discharge flap is used, then structural strength is improved, but automatic opening capability under negative pressure deteriorates
Solution Approach 1:
The patent employs a flexible elastomeric flap that can deform under negative pressure to automatically open the discharge opening. The elastomer material provides sufficient structural strength while maintaining the flexibility needed for automatic operation without mechanical actuators.
Solution Approach 2:
The patent changes the material parameter from rigid to elastomeric, allowing the flap to exhibit both structural integrity and elastic deformation capability. This enables the flap to open automatically under negative pressure while maintaining adequate strength for the application.
4Reliability
If a one-piece elastomeric component is used, then durability and seal integrity are improved, but manufacturing complexity for high-precision features increases
Solution Approach 1:
The patent selects elastomeric material with appropriate durometer and flow characteristics that enable complex one-piece geometry to be manufactured via injection molding. The material parameters are optimized to fill intricate mold cavities while maintaining dimensional accuracy and structural integrity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution provides efficient particle discharge with a large outlet cross-section, reduced risk of clogging, and increased durability, while maintaining over 80% pre-separation efficiency, suitable for heavy-duty applications with minimal installation space requirements.
Implementation Method 1
the at least one particle discharge flap, in the closed state, rests against a valve seat of the housing... precisely one particle discharge flap which is connected in one piece to the base and is oriented perpendicular to the axis of symmetry in the closed state
Implementation Method 2
round air filter arrangements with centrifugal pre-separation of particles or cyclone separators are often used. Pre-separation of particles makes it possible to keep the particle load of the actual filter element low.
Data Source
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AI summary
A particle discharge device (9A, 9B, 9C) for a filter arrangement (1), comprising a housing (10) and at least one particle discharge flap (18, 18', 19, 19') formed integrally with the housing (10), wherein the at least one particle discharge flap (18, 18', 19, 19') can be moved from a closed state (Z1) to an open state (Z2) for the discharge of particles (P) from the filter arrangement (1), and wherein the at least one particle discharge flap (18, 18', 19, 19') in the closed state (Z1) bears against a valve seat (16) of the housing (10) which rotates at least partially around an axis of symmetry (11) of the housing (10).